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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1373 (Automatic Transmission - ALLISON - DTC P0218 To DTC P0878) >> DTC P0716 or P0717 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: You must perform the Circuit/System Verification first.
  1. Ignition OFF, remove the turbine speed sensor connector.
  2. Connect the J 38522:  generator to the turbine speed sensor circuit, terminals A and B.
  3. Adjust the J 38522:  generator to 30 V, frequency to 1K Hz and duty cycle to 50 percent.
  4. Ignition ON, engine OFF, use a scan tool to verify the Turbine Speed parameter is between 900 to 1000 RPM.
    • If not the expected value, check the turbine speed signal and ground circuits for an open/high resistance, short to ground, or a short to voltage. If circuits test normal, replace the TCM. Refer to Control Module References for TCM replacement, setup, and programming.
  5. Test or replace the turbine speed sensor. Refer to Speed Sensor Replacement .
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